Little things on my new XJ 900 – Maybe you can help.

Hello together, I have run a few minor “problems” with my XJ 900 Diversion 4km Built in 1997 about 35,000 km. I bought the machine a good 2 months ago from a dealer near me. Before the collection a complete inspection with all liquids was done. Now I drive the XJ for about 700 km and I noticed a few small things. But I don’t quite know if the problems I have to deal with or things that are normal for the XJ. Learn the M 1. When the XJ is cold, I have the feeling that it clacks out of the engine. Can also mislead me. 2. When the XJ has run warm, the exhaust gases do not come from the right exhaust, but with such a light puff puff puff. Hard to explain. On the left, the exhaust gases are nice and even. I don’t know if this is normal. But I didn’t notice until today. I can’t remember that it was until now. 3. When I fall in the evening (day after day it falls). The light flickers sometimes, either when I flash or at the acceleration. As if the lighting system were short and then working again. Thank you for your thoughts. BG